Stitcher Radio-How does the Play New Only (AKA Play Unheard Only) setting work?-[Stitcher Radio]

Stitcher’s "Play New Only" (a.k.a. "Play Unheard Only") setting controls how playlists are assembled. When enabled, the audio player will skip shows that have been played back in their entirety; only shows that have not been heard at all or that have been partially heard will be selected for playback.